Belle II silicon vertex detector (SVD)

(Belle-II SVD Collaboration)

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The Belle II experiment at the SuperKEKB collider in Japan will operate at an unprecedented luminosity of 8× 1035 cm-2 s-1, about 40 times larger than its predecessor, Belle. Its vertex detector is composed of a two-layer DEPFET pixel detector (PXD) and a four layer double-sided silicon microstrip detector (SVD). To achieve a precise decay-vertex position determination and excellent low-momentum tracking under a harsh background condition and high trigger rate of 10 kHz, the SVD employs several innovative techniques. In order to minimize the parasitic capacitance in the signal path, 1748 APV25 ASIC chips, which read out signal from 224 k strip channels, are directly mounted on the modules with the novel Origami concept. The analog signal from APV25 are digitized by a flash ADC system, and sent to the central DAQ as well as to online tracking system based on SVD hits to provide region of interests to the PXD for reducing the latter’s data size to achieve the required bandwidth and data storage space. Furthermore, the state-of-the-art dual phase CO2 cooling solution has been chosen for a combined thermal management of the PXD and SVD system. In this proceedings, we present key design principles, module construction and integration status of the Belle II SVD.

Original languageEnglish
Title of host publicationProceedings of International Conference on Technology and Instrumentation in Particle Physics 2017 - Volume 2
EditorsZhen-An Liu
PublisherSpringer Science and Business Media, LLC
Number of pages7
ISBN (Print)9789811313158
Publication statusPublished - 2018
EventInternational Conference on Technology and Instrumentation in Particle Physics, TIPP 2017 - Beijing, China
Duration: May 22 2017May 26 2017

Publication series

NameSpringer Proceedings in Physics
ISSN (Print)0930-8989
ISSN (Electronic)1867-4941


OtherInternational Conference on Technology and Instrumentation in Particle Physics, TIPP 2017

ASJC Scopus subject areas

  • General Physics and Astronomy


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